Drill-bit reamer and gauge



Jan. 31, 192s. 1,657,611

` l. C.. BELL DRILL BITv REAMER AND GAUGE Filed May 28. 1926 rlmaentecl Jan.. 31, 1928.

UNITED STATES 1,657,611 ENT Vol-ufcE.

IVAN C. BELL, F

nsLLAs, runas, assrenon 'ro ann' eUIBnRsoN CORPORATION, or DALLAS, TEXAS, A conrona'rron or nnnnwnnn.

` Janina-Brr :annnnn Ann eenen.

Application led May 28, 1926. Serial No. 112,251.

This invention relates to new and useful improvements in drill bit reamers and gauges.

'lbe object ci' the invention is to combine En with the gauge rollers shown in my co-pending application led May'llz, 1926; Serial No. 103,037, rearoing cutterslproj'ecting beyond the gauge faces of said rollers so that the hole will be reamed after the disk cutters,

l@ but the gauge rollers will operate tosuspend cutting when the disks become out of gauge.

A further object of the invention is to provide a sim le construction by combining the cutters an gauges in single rollers mounted M on diametrically opposite sides of the body ci the bit. V

A'construction'designed to carry out the invention will be hereinafter described, together with other featuresoi the invention. The invention will be more readily understoodfrom -a reading of the following specitication and by reference to the accompanying drawings, in which an -example of the.4

invention is shown, and wherein:

Fig. l is a view partly in section and partly in elevation showing a bit equipped with reaming and gauge rollers constructed in accordance with my invention,

llig. 2 is a side elevation oit' the saine,

ll llig. 3 is a horizontal cross-sectional view teilten on the line 3-3 ot Fig. l, and

llig'. d is a horizontal cross-sectional view tellen on the line i- 4 of Fig. l.

lin the drawings the numeral lOdesignates bit body or stock7 which has a tapered ncrew-threaded pin il at its upper end. At

lower endthe body is shouldered and provided with a dependingm tongue l2. The sides ont" the stock are provided with vertical i3 and cheek plates lt are engaged therein and secured by transverse belts l d if. These plates engage under elders li the upper portion ci the laterally oilset aule members l@ circa cutting disks l@ `ionrnaled suitably supported by the c and lower ende ozl the cheelr' llt will be noted thaJ cheek have their sides e "ly e stock is reduced "g as -o give disks sul i ut i ee f lihe ertac provide a recess or cavity which is bisected by a vertical bore 2l extending downward from the upper end of the plate. A. cylindrical pin or shaft 22 is driven down this bore so aste lie between the openings receiving the nuts 16 and having a snug fit. On each pin is journaled a gauge roller 23 having its lower edges 'bevelled at 24. This roller is journaled in the cavity 20 and projects a short distancer beyond the surface of its cheek plate 14.

On the upper portion of the face of each roller l form a plurality of vertical cutting ribs or teeth 25 projecting beyond the smooth or gauge face ofthe roller. These teeth may be given any'particular angularity or bevel according to the best practices inthe field.y Reamihg cutters are quite common and the particular shape of the teeth is not a part of this invention. The upper and lower edges 260i the teeth 'are beveled. The teeth will out in an orbites large or slightly larger` than thatcut made by the disks 19, thus reaminr the hole 'as it is drille y By observing' Fig. 3 it will be seen that the cutting* diameter of the disks is greater than the diameter or distance from the outer or gauge surface of one roller to the outer or gauge surface of the other roller, and, therefore, these gauge surfaces of the rollersdo not contact with the side walls of the hole while the disks are-cutting1 or drilling. It will be obvious that as the cutting edges of the disks wear the diameters of said disks will be reduced', thereby reducing' the cutting diameter or circle of the bit. lt is pointed out that the disks would lcontinue to wear and after reaching a certain diameterv the lower ends of the cheek plates it would beein riding1 on the sides ot the holewhich would be tapered7 and said plates would soon his bit is, eut ci? The disksj cheek ook will thus be save :troni n i. c I" @litten alim.

DEW

if bit pulled up and loc i ica It is pointed out that if the' cutters did tend to function after the rollers engaged the Walls of the hole, the lower portion of i would be stoppedat this point and no indur done.

ile I* have shown and described the invention as applied to disk bits, it isto be understood that it may be applied to any drill movable. cutters.

bithaving a projecting cutter at its lower end, either xed or movable, and the invention is not .to be limited to cutting' disks or Various changesin the size and shape ot the diierent parts, as Well as modifications and alterations, may be made sco e of the appended claims.

at I claim, is: 1. In a drill bit, a bit stock, a cutter carried at the lower end of the stock, a air of gauge rollers having non-cutting aces mounted on the stock and projecting there'- from, and reaming teeth extending from said rollers Yfree from the faces thereof.l

2. In a drill bit, a bit stock, oppositly disposed cutterscarried by the stock, a pair of oppositel disposed gauge rollers mounted on the stoc above the cutters and projecting beyond the stock, said rollers being confined within a circle of less diameter than the drillingfclrcle of the cutters, and teaming v within the tiansyersely through the stock and Lemert teeth `on the rollers segregated from the gauge laces thereof and projecting beyond said faces. 3. ln a drill bit, a bit stock, a plurality of oppositely disposed and laterally offset cutter disks mount-ed on the stoclr, means on the stoclr ior engaging the side walls ot' the hole and for supporting the bit in nondrilling position when said disks Wear to a predetermined minimum diameter, and reaining cutters contiguous to said means.

Il. In a drill bit, a bit stock having seats along opposite. sides, vertical supports sccured in said seats, a central support, rolling cutters journaled between said supporte, said vert-ical supports having cavities in. theirouter sides, fange rollers journaled in the cavities ot said` vertical supports and projecting beyond the outer surfaces oi' said vertical supports, and vreanng teeth extending from a portion of the vertical surface ot ,each roller.

ln a drill bit the combination ot a bit stoclr and check lates fitted against the stock, a pair of 'astening devices passing plates, reaining and gauge rollers journaled 1n the sides `of the plates, and vertical shafts on which the rollers are mounted disposed in the plates and confined against vertical movement by said 'fastening devices.

ln testimony whereof I ellis my signature.

iwan o. BELL, 

